Exposure-table



L. SMITH.

EXPOSURE TABLE.

APPLICATION FILED 1AN.24.1-92o. y

1,357,085. Patented out, 26,1920.

Chienne UNITED STATES PA TENT OFFICE. d'

4LOUIS SMITH, OF,HILLYARD, WASHINGTON. i

EXPOSURE-TABLE.

especially by photographers lin connection with the operation ofcamerasby means of whichV the required information forv producing bestresults With respectto light and exposure is furnished in compact form,and carried onthe camera as an attached part thereof. With this end invievv the inven-` tion consists in certain novel combinations andarrangements of parts including datay cards or sheets forming part of apacket, together With a packet receiver fixed to the camera toaccommodate the packet, as will hereinafter be more fully explained andset forth in the claim.

In the utilization of the invention the data l cards are used forfurnishing information and guides as to light and exposure, in differentconditions of weather in different times of the year, together With dataas to sea level, altitudes, climatic conditions, &c., for use by thephotographer and these data sheets or cards are compactly arranged andconveniently carried as a part `of the camera for ready access by thephotographer.

In the accompanying drawings I have illustrated one complete example ofa preferred form of the invention, constructed and arranged according tothe best mode lI have so far devised for the practical application ofthe principles of the invention, adapted for use with a camera, but itwill be understood that changes and alterations may be made Within thescope of my claim Without departing from the spirit of the invention.

Figure l is a back view, in elevation of a camera with the device of myinvention applied thereto.

Fig. 2 is a perspective view of the packet and data cards, detached fromthe pocket or tion.

The device of the invention is preferably attached to' the back, as 1 ofthe camera, in the manner illustrated in Fig. 1 ofthe drawings, whereina carriera of usual or standard:

. specification of Lettersratent.

Applicationraieauanuary 24, 1920. v,serial N.

. poses as 9, and this card, together with the packet receiver forpurposes of illustra# the flange 7 by means of an packet receiver 2attached thereto. pocket is made upof sheet metal, and may beyornamental in 'an ,esthetic sense for `enhancmg the appearance of thecamera, and includes a transparent plate or cover 2', the sheet metal`structure being offset from the Withdrawal of the packet. i f f In'theperspective view of Fig. 2 the packet is best illustrated as comprisinga base plate 3, preferably of sheet metal, and the one-piece device isfashioned with opposed turned up ends 4 and 5, 'and in turn each ofthese ends is formed with inwardlyv extending flanges 6 and 7 which lieparallel .with the ibase plate 3. f

A suitable or required number of data cards 8 are utilized, and made upof celluloid, paper, or thin metal, and thesefdata cards arearranged,vpreferably inchrono` logical order as to years and months, themonths being designated at one end of the card, and the balance, or ofthe card is divided by intersecting columns forming .squares in whichare arranged figures or tables, giving tabulationsV regarding time orhours, together With data as to light and exposure for guiding thephotographer.

The series of data cards is `provided with a top plate or card foridentification purother cards ofthe series, are all perforated 'at onecorner and pivoted ona common axis il() in the form of a through thebase plate and the flange 6 at one corner of the'base plate. n

The ends of the cards are normally retained under the flanges and 7,andthe j packetlies on the baseplate in alinement with said plate withthe ends thereof under ythe end flanges, but the cards are free toswing, individuallv or selectively on the common axis, as indicated inFig. 2, when the packety is free .orwithdrawn from the receiver or`pocket 2 of the camera.

Thepacket is adapted to slide into thek receiver orv pocket and may beWithdrawn therefromvvith facility when required, and when thecards, Vorcard, are swung on their pivot thefentering corner is guided under Yupturned guide lip l1 Which turns upwardly fromthe opening under theiange.AVA

Patentedoet. 26, 1920. f

`type is illustrated with the fixed pocket or The v ramera back'in orderto form a space therey,1n for the reception and ready pivot pin'extending Y In stowing away the packet, with all the data cardsuniformly packed and retained 111 regular order in the packet beneaththe end flanges, the packet is bodily inserted in Y the open, left endof the receiver, and slid along, with the base plate and flanges 1nfrictional contact with the receiver andV camera wall, until the partsare alined-as in Fig. l. To facilitate withdrawal of the packet athumbor finger nail slot l2 is fashioned at the end of the cover plate Q.

of the receiver for` insertion of the edge of' the nail and then thepacket is pushedor shoyed to the left in Fig'. l until it is free fromthe receiver. Then thus detached one or breaking of the ends of thecards, thus prolonging their life and adding to the durability of thedevice. The upturned or flared yguide lip l1 on the flange 7 alsofacilitates the manipulation of the cards and insures their return t0and entrances beneath the flange 7. f

In this manner the camera '1s equipped with a useful and ornamentalattachment that enhances the utility and appearance'of the camera, andprovides the photographer with a compact and readily accessible exposuretable for use in connection with the 0peration of the camera.

That I yclaim is A packet formed with a base plate fashioned withupturned ends and inwardly e):- tending retaining flanges, a series ofdata cards pivoted flange with their opposite ends under said inwardlyextending flanges7 and an upturned end on the flange at `the oppositeend of the base plate'to guide the free ends of the cards.

ln testimony whereof' I affix my signature.

LOUIS SMITH. I

on a common center in one

